I would personally advise doing what i did and taking a name straight off sc2manager, as the names look very authentically korean.
here as some examples ive just pulled up:
brakEsoUtH
c0LDf1rE
prOcESsAcroSs
ztati0nr3gr3t
etc.
Alternatively you could do the Korean on iCCup naming process by typing out a name on a Korean keyboard but setting the keyboard to English so it's like zklytyls or something.
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